Safety valve for oil burners and the like



Feb. 3. 1925.

1,524914 1.. ca. DANIELS SAFETY VALVE FOR OIL BURNERS AND THE LIKE Fil ed Jan. 17, 1922 citizen of the United States,

PatmtedFeb. a, 19 5 .v we

mm o. ram s,- or nocxroan, nmnvors.

' wm vanva roi: 011. commas ms ran Lnm.

7 new and, useful Improvements in Safety which the following is a specification.

connection i "is property dam Valves for 'Oil Burners" and thelike, of

"This invention pertaining in: eneral to valves, .has more particular" re erence safety valves i pecially adapted for use 1n oil or other liquid fuel burners. ese burners are extensively used in domestic furnaces and heaters, and in the event'that the'fiameis accidentally extinguished and gravity or other constant" flow feed. is'employed, the fuel will-oven flow. This overflow is exceedingly dangerous b reason of the combustible nature of 'the liquid fuel, and in any event .will cause The, primary object bf the present invert tion is to provide a simple and novel valve overflow in the burner device which tively shut off the fuel supply if the ames'in the burner is extinguished,- and to this end, I. utilize the for f initiating the shut-off action. My invention contemplates the provision of a' valve which will 0 rate with absolute certainty .and will be ependable under all conditions and will not beaifected by changes in temperature or humidity, or by the surroundings in any particular place or use, which by reason of dampness, etc., impair andsometimes render inoperative prior devices provided for the purpose of shutting 05 the fuel supply under the conditions mentioned.

Another object is to provides. safety'valve of t'.e character described embodying butfew parts constructed in v a simple manner so as .to be capable "of production at a small,

cost, and, which function ina noval manner, insuring certainty' of operation, as will be explained more'fully hereinafter. Other objects and attendant advantages will be appreciated by those. familiar with this art as the invention becomes better understood by reference to the following description-"whemconsidered in connection .with' the accompanying drawings, in

1 is asideelevation, partly in A n cauon'aiea January 17, 192;, s arm. 529,823.

my invention;

pcd to the closed position;

bucket removed; and

"event that the burner flame is .fuel. In the present illustration,

the feed is immaterial a section, Oran oil burning lam furnace equipped .with a safety valve embodying Fig. 2, an enlarged view of the safety valve in the'normal set position with the valve open;

i Fig. 3, a similar view with Fig. 4, a view of the safety valve looking at the right hand side of Fig. 2, with the Fig. 5, a detail section taken substantially on the line 5 5 of Fig. 2. g

In illustrating the use of my invention, I have shown-merely in outline, a heater or furnace 6, equipped with an oil 'burner 7, to which is connected'a fuel supply pipe 8 and .an overflow pipe object of the present invention is to utilize the overflow through. the pipe 9 (in the extinguished) to automatically'shut off the fuel supply.

In the fuel supply line'therc 'is"mountcd in anysuitable manner, a shut-o'fi' valve and means for regulating the flow or feed of the I employ a shut-oil valve 11 and a regulating valve 12, each of which may be of any suitable or preferred construction, it being observed that the manner of regulating or adjusting to the present invention. The shut-off valve shown, is of the 9. The j primary the parts tripglobe needle valve type, including a valve stem 13, which when given a partial rotative movement in opposite directions, closes and opens the valve. passage. This valve is normally held open by means of a weighted arm 14, fixed to the valve stem 13 .and held as shown in Fig. 2, at one side of the .vertical' plane or center of the valve stem, by means of an intermediate stop and trip device, which will now he described.

This device consists of integrally formed lever arms 15 and 16, a hub 17 and an extension 18 from the arm 15 provided with stops- 1? and 21 adapted to abut against the casing of the valve 11. -To the outer end of the lever arm'15 is suspended a bucket-or any suitablereceptacle 22. The lever arm 16 has a V-shaped forward edge 23 adapted to engage in a complemental face 24 in the arm 14, as shown plainly in Fig. 5. The purposev of these V-shaped faces is to maintain the bucket-carrying tion to the weighted arm and to hold the collar 17 'of said bucket member against lengthwise displacement on the stem 13, thereby to prevent any binding or frictional contact between the ends of said-collar and the faces of adjoining parts on the valve stem. i The arts described are so' shap'ed'and relative y arranged that the weighted arm will be held in the normalo n position; shown in..Fig. 2 by. reason 0 contact tween the faces 23 and 24 and between the stop 19 and the valve case. This-positioni' is maintained by reason of the. center of ter of the valve stem. The parts are, therefore, in a set position with the valve open, the flow or 'feed being regulated by the valve 12. Assuming now,that the flame ,in the burner is extinguished, the. oil will overflow in the burner 7 and pass through the pipe 9 into'the bucket 22. Whenthe bucket is sufiiciently filled. it will overbal an'ce the weighted arm and drop to the position shown in Fig; ii ljmited" by the; stop 21. This movementi'fliowever, of the arm ljs not-in itself utilized to shut off the nigiedle valve. It merely initiates the shuts of? movement in that it throws the weighted arin-pastthe center of the needle valve and ,permits said weighted arm to freely gravitate. The'weighted .arni thus gains momen tum and its :greatest force is exerted in the. act of'finallyl'losing'thevalve, as distinguishedfrom a direct spring action in which the greatest pressure .is exertedduring the z initialspring movement. Consequently, in the present case the arm 1-5"may bestopped i trany time after ithas swung the weig ted a'rm'substantially past said center, and said .weig hted arm will fall withlincreasingforce. I sons to positively shut ofi'vthe valve. Thevalve-closing movementmayvary more or less according to the design and proportions:v-

of the particular valve, and in the present iiis'tance the trip moves through anarc of approximately 60'degre's,while that of the weighted arm is approximately 120 dcgrees In this example, the valve is completely. closed when the weighted arm reaches sub.-

stantiallv the horizontal plane of the valve stem. However, if a greater number of degrees should be required for. completely closing the valve. :there "is available ap roxlmately 90' degrees in addition to the c osing less delicate arts rusted and fail- I claims. 'in which-" lever loose on the valve or humidity, or under severeconditions suchas the resence of heavy dampness, which invaria l v-1 s inimical to positive operation of other devices by reason of the more or ing to'function at tllbcl'ltlCill time. It will 1 1 also be observed that this construction allows of a maximumvalve opening equalthe hand adjustment valve 12;

substantially to the maximum opening pf 1e Itis believed thatthe foregoing conveys?- ..a clear understanding of the objects refaced above, and while I havejillnstrat a single working embodiment, should-be gravity of the weighted arm being disposed at agi'ven side of the vertical plane or cenbllfi N understood that considerable change \might be made in details of construction without departing from the spirit and scope of the I :mvention as expressed in the appended;

Iclaim: z. 1. Ina liquid fuel supply, the. combina-j tion of a valve having -a"horizontally disposed oscillatory valve. stem, an arm .fixed .to' said valv stem and equipped at its outer end with a veight, a receptacle adapted'to "be filled b overflow of the liquid fuelya V lever loos onthe valve stem and carrying 1 at its. outer end said receptacle, stops'ffor limiting-oscillation of saidlever in opposite v I directions, and means actuated yfsaidlever ier-tilting said weight-equippe armf gfrpm.

a valve-opened position toea alve'closmg position, said weight-equippedelii'm diaving a closing movement under the gjcue of the l weight subsequent to" the closing movement of the rece t'acle lever. i v

2. In a iquid ,said lever for limiting its oscillation op.

posite directions, and *means- Iactuat'ed bv said lever for-tilting said weight-equipped arm from a valve opened position to a'valve closing position; said means pennittingi the 116 weight-equipped arm, to ni'ove in a, valve" closing direction a greater number of de grees than said lever in the valve closing movement. 1

3. The combination of a valve having ii iii? with said weight .that at one limit it maintains the latter in said open position, and a receptacle suspended from the outer end of I i v v v A I I said am adapted by filling to throw said weight beyond said center, whereby to close 4 thevalveby the fall of said; weight.

-4.YThe combination of a valve having a valve stem adapted by rptative movement to s openhmlclose the valve, 11- weiq'ht fixed to said; valve stem and normally disposed above and-at one side of the center thereofin .'an open position, an arm loose on the valve stem and having stops for limiting oscillation in .both directions and so co-operating with sa id veightthat at one limit it mam- .tainsthe latter is said open position, and a receptaclsdspen'ded from the outer end of saidun'n adapted by filling to throw .sa id weight beyond said center, whereby to close the valve hylthe fall of said weight, the

'. valve-closing movement of said arni being limited by another of its stops without in terfering with continued fall of the weight which fall completes closing of the'valve.

sides of a center tohold the valve in opened' 5. 'lhe-conilnnation of a valve havin'ga horizontally disposed oscillatory valve stem, :1 weight ,or-irentricallv fixed. to said valve stem and adapted wluu'i'thi'own to differentand closed positions, a lever-loose on the valve stem and having a receptacle-carrying ,1

arm and a weight-actuatin part and stops for limiting oscillation of site directions, and a receptacle carried by to a predetermined degree lever will o the first mentioned arm, the arrangement being such that when said receptacle is filled adapted to receiveov e lever in oppoand toifall alimitedfdistanoe under itsweight, a second lever fixed to .said valve stem and equipped with a weight adapted for closing the valve; means whereby the receptacle lever will initially move thegweight direction, and means whereby the weight lever will have lever ,-m a valve-closing a valve-closing movement under the momen- 7. In .a' liquid fuel supplyg the combination of a valve having an oscillatory valve stem, a-lever loose-on saidvalve'stem and eguippedat its outer end with a rece tacle a a tedto receive overflow of the fue' a second lever-fixed to'said valve stem and equipped with'iaweight adapted for' closing the valve, and rneanswhereby the receptacle" lever will move the weight lever in 1a,. valve-closing direction and whereby the wei ht lever has a valve-closing movetumofits weight subsequent to fall'of said receptacle.

ment's'u sequent to the closing nioveinent of #3 the receptacle lever.

LEE e. DANIELs. 

